this is my second StroboStomp HD. first was an early one, second one is slightly revised hardware, most notably they now include a velcro pad.
I can say that this is one of the best pedal tuners on market. when you need enough accuracy to set up your instruments, I just need a hardware strobe. Polytune, Pitchblack or anything digital is not enough accurate for this. currently two pedal tuners on the market provide a real strobe: Peterson StroboStomp HD and the Sonic Research Turbo Tuner. I chose the former, as I prefer the display.
so, what do we get:
1. a real strobe with no needle mode. it's extremely accurate and can confuse new users for a while. but you'll get used to it
2. a color display with user-changable color, visible in direct light as monochrome
3. 'sweetened tunings'. I sometimes use the GTR, but that's it (I prefer equal temperament on well set-up instruments)
4. always on mode or true/buffered bypass. I didn't have good luck with the buffer, but the true bypass is nice enough (like better than on Pitchblack Advance). true bypass is totally pop-less on engaging or disengaging
5. power doubler, so you can daisy-chain another pedal. I don't use this, but big chassis allows it. same for battery operation
6. USB connectivity: update firmware and set some custom settings I never yet used
7. want your reference A to be 432Hz? no problem, it will save it upon power off (Korg, I'm looking at you!) want it to be 400 or 490Hz? or 444.4? again no problem
8. want it to display string numbers, not notes? not a problem. want to transpose? again not a problem. want it to display Bb instead of A#? again not a problem
it might have too many features, I'm actually using very few of them, but very happy of everything I use. and let me repeat myself: if you want to set up your intonation, you need only a hardware strobe tuner, accept no substitutes!